Electric valve circuits
United States Patent 2228844
Inventors:
Palmer, Harry L.
Publication Date:
01/14/1941
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Export Citation:
Assignee:
GEN ELECTRIC
Primary Class:
Other Classes:
327/104, 315/356, 323/320, 315/195, 315/275, 315/194
International Classes:
H02M7/15; H02M7/12